package com.example.common.chapter04;

import java.text.SimpleDateFormat;
import java.util.Date;

public class WaitNotify {

    static boolean flag = true;
    static Object lock = new Object();

    public static void main(String[] args) {
        Thread waitThread = new Thread(new Wait(),"waitThread");
        waitThread.start();
        Thread notifyThread = new Thread(new Notify(),"notifyThread");
        notifyThread.start();
    }

    static class Wait implements Runnable{
        @Override
        public void run() {
            synchronized(lock){
                while (flag) {
                    try {
                        System.out.println(Thread.currentThread() + "flag is true, wait@"
                                + new SimpleDateFormat("HH:mm:ss").format(new Date()));
                        lock.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                System.out.println(Thread.currentThread() + "flag is false,running@"
                        + new SimpleDateFormat("HH:mm:ss").format(new Date()));
            }
        }
    }
    static class Notify implements Runnable {

        @Override
        public void run() {
            synchronized (lock) {
                System.out.println(Thread.currentThread() + "hold lock.notify@"
                    + new SimpleDateFormat("HH:mm:ss").format(new Date()));
                lock.notifyAll();
                flag = false;
                SleepUtils.second(5);
            }
            synchronized (lock) {
                System.out.println(Thread.currentThread() + "hold lock again.sleep@"
                    + new SimpleDateFormat("HH:mm:ss").format(new Date()));
                SleepUtils.second(5);
            }
        }
    }

}
